CN102324275B - Fiber composite core rod for intelligent overhead electric power transmission lead and preparation method thereof - Google Patents
Fiber composite core rod for intelligent overhead electric power transmission lead and preparation method thereof Download PDFInfo
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- CN102324275B CN102324275B CN 201110266831 CN201110266831A CN102324275B CN 102324275 B CN102324275 B CN 102324275B CN 201110266831 CN201110266831 CN 201110266831 CN 201110266831 A CN201110266831 A CN 201110266831A CN 102324275 B CN102324275 B CN 102324275B
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Abstract
The invention discloses a fiber composite core rod for an intelligent overhead electric power transmission lead. The fiber composite core rod comprises a carbon fiber braiding sensing fiber unit, an epoxy resin composite carbon fiber layer which is formed at an external of the epoxy resin composite carbon fiber layer, and an epoxy resin composite basalt fiber layer which is formed at the external of the epoxy resin composite carbon fiber layer. The carbon fiber braiding sensing fiber unit comprises a sensing fiber and a carbon fiber braid ply which is formed at an external of the sensing fiber. The carbon fiber braid ply is formed by braiding a plurality of first carbon fibers out of the sensing fiber. The epoxy resin composite carbon fiber layer and the epoxy resin composite basalt fiber layer are compounded through uniform dipping in epoxy resin. The epoxy resin is formed among the carbon fiber braid ply, the epoxy resin composite carbon fiber layer and the epoxy resin composite basalt fiber layer. According to the composite core rod in the invention, uniformity and stability of a sensor structure can be increased, precision and sensitivity of detection can be raised, and a test error brought by bending interior can be reduced.
Description
Technical field
The present invention is applied to the intelligent grid aspect, relates in particular to the electric power transfer aerial condutor.
Background technology
Utilize distributed fiberoptic sensor, the temperature that is subject in detection wire real time execution process and the impact of ess-strain, this kind wire is called the intelligent electric power transfer wire.
Distributed fiberoptic sensor, as Brillouin scattering otdr measurement technology, be in the world recent years a full-fledged sophisticated technology, use very extensive.Optical fiber is a kind of very sensitive distributed sensor, and it can demonstrate ± and the microstress of 0.01 ℃ and approximately hundreds of Pa levels changes.Its main feature is, utilizes a common optical fiber, is similar to the mode that nervous system distributes, and as required, implants among detected material, and detection range can reach several kilometers.It utilizes optical fiber to be subject to the used time of doing of temperature and ess-strain along the line, the variation of the drift value of frequency and fiber stress strain and temperature is good linear relationship, so just can obtain the distributed intelligence of optical fiber temperature along the line and ess-strain by the frequency drift amount of the natural Brillouin scattering dorsad in measuring optical fiber, namely certain a bit on, the abnormal temperature that detected material occurs and the variation of ess-strain.This technology can be carried out Real-Time Monitoring, test data accurately and reliably, precision is very high, dynamic range is wide, be widely used at present, the detection control technology of most advanced maturation.
In practical application, the rationally reliable and safety and stability of embedded fibers has influence on the result of monitoring, if it is unreasonable to implant optical fiber, the test result that even can lead to errors perhaps causes test data unstable, that repeatability is bad.
In the application of intelligent aerial condutor, especially on the multiple core aerial condutor of fiber, technology in the past is simply with the center of embedded fibers to composite core rod, be that optical fiber and fiber carry out non-twist epoxy resin impregnated Compound Machining simultaneously, it is the same that optical fiber is regarded as fiber, is same as general fiber composite processing mode.Form like this optical fiber-fiber composite plug, it has advantage is simple, and directly in the composite core rod manufacture process, as a unit, centering forms optical fiber-fiber composite plug with optical fiber.
This optical fiber-fiber composite plug, when plug was subject to tension stress or temperature change, fiber was arranged around the optical fiber evenly and rationally whether, data reliability is detected at place, electric power transfer aerial condutor fault point larger impact.
Summary of the invention
The technical problem to be solved in the present invention is: overcome existing composite core rod and detect the poor defective of data reliability, a kind of uniformity and stability that increases sensor construction is provided, improves the precision and the sensitivity that detect, reduces fiber composite core rod for intelligent overhead electric power transmission lead of the test error that interior curve brings and preparation method thereof.
In order to solve the problems of the technologies described above, first technical scheme of the present invention is: a kind of fiber composite core rod for intelligent overhead electric power transmission lead, and it comprises a carbon fiber knit sensor fibre unit, epoxy resin carbon fiber reinforce plastic layer, the compound basalt fibre layer of epoxy resin that forms in the outside of this epoxy resin carbon fiber reinforce plastic layer that forms in the outside of this carbon fiber knit sensor fibre unit; The carbon fiber knit layer that this carbon fiber knit sensor fibre unit comprises sensor fibre and is formed on the outside of this sensor fibre, this carbon fiber knit layer weaves in the outside of sensor fibre with some the first carbon fibers and forms; This epoxy resin carbon fiber reinforce plastic layer, the compound basalt fibre layer of this epoxy resin evenly flood in epoxy resin and are composited, and epoxy resin is formed between the compound basalt fibre layer of this carbon fiber knit layer, epoxy resin carbon fiber reinforce plastic layer and epoxy resin.
The further restriction of technique scheme is, this epoxy resin carbon fiber reinforce plastic layer is to form with the outside of some the second carbon fibers at this carbon fiber knit layer.
The further restriction of technique scheme is, the compound basalt fibre layer of this epoxy resin is to form with the outside of some basalt fibres at this epoxy resin carbon fiber reinforce plastic layer.
The further restriction of technique scheme is, this epoxy resin carbon fiber reinforce plastic layer is to form in the outside of this carbon fiber knit layer with some the second carbon fibers, and the compound basalt fibre layer of this epoxy resin is in the formation of the outside of this epoxy resin carbon fiber reinforce plastic layer with some basalt fibres.
In order to solve the problems of the technologies described above, second technical scheme of the present invention is: a kind of preparation method who prepares described fiber composite core rod for intelligent overhead electric power transmission lead, this preparation method comprises the steps:
Step 1: the first carbon fiber is carried out surface treatment, then with the first carbon fiber, sensor fibre is woven, prepare carbon fiber knit sensor fibre unit;
Step 2: the second carbon fiber and basalt fibre are carried out surface treatment;
Step 3: the basalt fibre of the second carbon fiber of carbon fiber knit sensor fibre unit, aequum, aequum is introduced in epoxy resin impregnated zone flooded simultaneously, then pass through pultrude process, outside in carbon fiber knit sensor fibre unit forms epoxy resin carbon fiber reinforce plastic layer, the compound basalt fibre layer of epoxy resin successively, and epoxy resin is formed between the compound basalt fibre layer of this carbon fiber knit layer, epoxy resin carbon fiber reinforce plastic layer and epoxy resin, thereby obtains this described composite core rod.
The beneficial effect that the present invention obtains is: form uniform carbon fiber knit layer with carbon fiber in the outside braiding of sensor fibre, have following three aspects: advantage:
1, increase uniformity and the stability of sensor construction (being exactly in fact carbon fiber knit sensor fibre unit);
2, improve precision and the sensitivity that detects;
3, reduce the test error that interior curve is brought.
Description of drawings
Fig. 1 is the cross-sectional view of fiber composite core rod for intelligent overhead electric power transmission lead of the present invention.
Fig. 2 is the cross-sectional view of carbon fiber knit sensor fibre of the present invention unit.
Fig. 3 is the structure chart of carbon fiber knit sensor fibre of the present invention unit.
Fig. 4 is the schematic diagram that carbon fiber knit sensor fibre unit is subject to composite core rod stress influence of the present invention.
Fig. 5 is the schematic diagram of carbon fiber knit sensor fibre unit bending situation.
Fig. 6 is preparation method's flow chart of fiber composite core rod for intelligent overhead electric power transmission lead of the present invention.
Embodiment
See also Fig. 1 to Fig. 6, the present invention proposes a kind of fiber composite core rod for intelligent overhead electric power transmission lead, and it comprises a carbon fiber knit sensor fibre unit 1, one 1 outside forms in this carbon fiber knit sensor fibre unit epoxy resin carbon fiber reinforce plastic layer 2, a compound basalt fibre layer 3 of epoxy resin that forms in the outside of this epoxy resin carbon fiber reinforce plastic layer 2.
This carbon fiber knit sensor fibre unit 1 comprises sensor fibre 12 and carbon fiber knit layer 14.
This carbon fiber knit layer 14 weaves in the outside of sensor fibre 12 with some the first carbon fibers 142 and forms.
This epoxy resin carbon fiber reinforce plastic layer 2 is to form in the outside of this carbon fiber knit layer 14 with some the second carbon fibers 22.
The compound basalt fibre layer 3 of this epoxy resin is to form in the outside of this epoxy resin carbon fiber reinforce plastic layer 2 with some basalt fibres 32.
Around this carbon fiber knit layer 14, some the second carbon fibers 22 around, some basalt fibres 32 around after the epoxy resin-impregnated (not shown), form epoxy resin carbon fiber reinforce plastic layer 2 and the compound basalt fibre layer 3 of epoxy resin.
Epoxy resin is formed between this carbon fiber knit layer 14, epoxy resin carbon fiber reinforce plastic layer 2 and the compound basalt fibre layer 3 of epoxy resin by even dipping.The compound basalt fibre layer 3 of described epoxy resin plays the insulating material performance, avoiding in the electric power transfer process, and the power consumption that the conductivity of carbon fiber itself causes.
The preparation method of fiber composite core rod for intelligent overhead electric power transmission lead of the present invention comprises the following steps:
Step 1: the first carbon fiber 142 is carried out surface treatment, then weave with 142 pairs of sensor fibres 12 of the first carbon fiber, prepare carbon fiber knit sensor fibre unit 1;
Step 2: the second carbon fiber 22 and basalt fibre 32 are carried out surface treatment;
Step 3: the basalt fibre 32 of the second carbon fiber 22 of carbon fiber knit sensor fibre unit 1, aequum, aequum is introduced in epoxy resin impregnated zone flooded simultaneously, then pass through pultrude process, 1 outside forms epoxy resin carbon fiber reinforce plastic layer 2, the compound basalt fibre layer 3 of epoxy resin successively in carbon fiber knit sensor fibre unit, and epoxy resin is formed between this carbon fiber knit layer 14, epoxy resin carbon fiber reinforce plastic layer 2 and the compound basalt fibre layer 3 of epoxy resin, thereby obtains this described composite core rod.
When carrying out fiber composite, get final product according to common pultrusion method, can carry out modification to various types of materials, to strengthen the performance of plug.
Fig. 6 is preparation method's flow chart of fiber composite core rod for intelligent overhead electric power transmission lead of the present invention.
At first select suitable high temperature resistant monomode fiber, its various performances see also table 1 " a kind of high-temperature resistant optical fiber performance index list ".
What table 2 represented is the carbon fiber knit parameter.According to parameter, sensor fibre 12 is woven; Braiding machine should be selected the small-sized machine that is suitable for the superfine wire braiding.The suitable knitting process of the present invention of reclining posture braiding machine.
In knitting process, the size of carbon fiber knit tension force and uniformity have important effect, directly have influence on the performance of integral core rod, i.e. the implantation counter stress strain of Fibre Optical Sensor (be exactly in fact carbon fiber knit sensor fibre unit 1) and the impact of temperature detection.Select suitable sensor fibre to put fine tension force, reach the coupling of carbon fiber knit and fiber stress.In the present invention, carbon fiber is selected the T700 type product.
The first carbon fiber 142 to sensor fibre 12 braidings should carry out surface treatment in advance, to reach the compound interface performance of optimization, reduces simultaneously post-processed to the impact of sensor fibre 12.Because the coat of sensor fibre 12 own has been the epoxy resin material, itself and later stage epoxy resin compound has good compatibility.
All the other technological process parts are carried out according to the fiber composite pultrude process of routine.
After braiding, plug enters except wet zone, to remove moisture to the impact of composite performance.
Before dipping, reply the second carbon fiber 22, basalt fibre 32 carry out surface preparation, to reach good interface performance.
Plug enters preforming and subsequent consolidation zone through impregnation zone, then gets and Wire winding shaft through drawing, and finally completes the manufacturing of composite core rod of the present invention.
Fig. 3 is the structure chart of carbon fiber knit sensor fibre unit 1.The coefficient of linear expansion of carbon fiber has negative temperature effect, and namely with the rising of temperature, carbon fiber has the trend of contraction.The coefficient of linear expansion of carbon fiber is along fiber axis to being about :-0.072 * 10
-8/ ℃～0.9 * 10
-6/ ℃; The coefficient of linear expansion that comprises the optical fiber of epoxy coating is 1.8 * 10
-6/ ℃; And the coefficient of linear expansion that matrix resin is epoxy resin is about: 45 * 10
-6/ ℃, when matrix resin and carbon fiber compound tense, comprehensive coefficient of linear expansion is 1.7 * 10
-6/ ℃.
Adopt like this optical fiber three-phase composite structure of carbon fiber, epoxy resin, coating, can guarantee has approximately uniform elongation or shortening when variations in temperature between optical fiber and carbon fiber, can not produce bad added influence to optical fiber.In addition, the Young's modulus of optical fiber is 72GPa, and carbon fiber composite epoxy resin young modulus of material is 120GPa, and when composite core rod was subject to affecting of linear tension stress, optical fiber was subject to the very strong protective effect of carbon fiber, can not produce disadvantageous added influence to optical fiber.
In the present invention, form uniform carbon fiber knit layer 14 with the first carbon fiber 142 in the outside braiding of sensor fibre 12, have following three aspects: advantage:
1, increase uniformity and the stability of sensor construction (be exactly in fact carbon fiber knit sensor fibre unit 1):
Can produce the good carbon fiber knit layer 14 that coats uniformly sensor fibre 12 with the first carbon fiber 142 braidings, so uniform structure is on plug is used, when STRESS VARIATION and variations in temperature occur, also guaranteed on the plug length direction, evenly reaching of this variation is reliable.And vertically this uniformity of longitudinal arrangement structure of carbon fiber is not so good as braiding structure.
2, improve precision and the sensitivity that detects:
Carbon fiber knit sensor fibre unit 1 as shown in Figure 4 is subject to the schematic diagram of composite core rod stress influence of the present invention, carbon fiber axial stress X, the longitudinal stress Y of plug, radial stress Z.During general plug affected by force, the carbon fiber of inclination carbon fiber axially on, the impact of under tension upwards produces stress in the sensor fibre footpath simultaneously; Symmetry because of braiding structure, cause the carbon fiber of braiding to draw close to the center of sensor fibre 12, strengthen the ability that composite core rod stress passes to Fibre Optical Sensor (being exactly in fact carbon fiber knit fiber unit 1), had so higher and reliable tension stress accuracy of detection and sensitivity.Vertically carbon fiber longitudinal arrangement structure does not have these characteristics.
3, subtract the test error that inner little bending brings:
The schematic diagram of carbon fiber knit sensor fibre unit 1 crooked situation as shown in Figure 5.When composite core rod is subject to flecition, the carbon fiber knit layer 14 of braiding is because in the shape of a spiral, its top spiral will be widened, the bottom spiral will be by constriction, but carbon fiber distortion itself is very little, its inner sensor fibre 12 is subject to that crooked impact is less, and measuring fiber sensing data precision is high like this, impact that can the accurate response extraneous factor; Compare with vertical carbon fiber longitudinal arrangement, this situation carbon fiber itself is stretched and is shortened larger, inner sensor fibre 12 to be subject to the carbon fiber knit layer 14 of outer fiber larger because of the crooked impact that brings.
Table 1 high-temperature resistant optical fiber performance index list
Table 2 carbon fiber knit parameter
| Sequence | Project | Parameter | |
| 1 | Fibre diameter | 0.485 |
|
| 2 | The weaving spindle number | 16 |
|
| 3 | The carbon fiber specification | 0.5K | |
| 4 | The carbon fiber filament diameter | 7um | |
| 5 | The carbon fiber doubling | Single | |
| 6 | The carbon fiber bundle filament diameter | 0.2mm | |
| 7 | Lay of braiding | 2mm | |
| 8 | The unit external diameter | 1.49mm | |
| 9 | Count | 59.40% |
Table 3 is " an embodiment intelligence aerial condutor detects the characterisitic parameter table ", shows good data precision and sensitivity.
| The Application standard telecommunication optical fiber, same optical fiber namely can be used for communicating by letter, also can be used for monitor strain and temperature simultaneously |
| Real-Time Monitoring strain and temperature |
| Technical parameter |
| 100 kilometers of monitoring ranges are round |
| The space accuracy of detection is low to moderate 5 centimetre 10 |
| Dynamic range 25dB, 30dB |
| The sensor fibre material ℃ is depended on to+300 ℃ in temperature monitoring scope-270) |
| Strain monitoring scope-3%(compression) arrive+the 4%(stretching) (30000 ,+40000 μ ε) |
| 0.005 ℃ of temperature resolution |
| Temperature measurement accuracy (2s) ± 0.1 ℃ |
Claims (5)
1. fiber composite core rod for intelligent overhead electric power transmission lead, it is characterized in that, it comprises a carbon fiber knit sensor fibre unit, epoxy resin carbon fiber reinforce plastic layer, the compound basalt fibre layer of epoxy resin that forms in the outside of this epoxy resin carbon fiber reinforce plastic layer that forms in the outside of this carbon fiber knit sensor fibre unit; The carbon fiber knit layer that this carbon fiber knit sensor fibre unit comprises sensor fibre and is formed on the outside of this sensor fibre, this carbon fiber knit layer weaves in the outside of sensor fibre with some the first carbon fibers and forms; This epoxy resin carbon fiber reinforce plastic layer, the compound basalt fibre layer of this epoxy resin evenly flood in epoxy resin and are composited, and epoxy resin is formed between the compound basalt fibre layer of this carbon fiber knit layer, epoxy resin carbon fiber reinforce plastic layer and epoxy resin.
2. fiber composite core rod for intelligent overhead electric power transmission lead according to claim 1, is characterized in that, this epoxy resin carbon fiber reinforce plastic layer is to form in the outside of this carbon fiber knit layer with some the second carbon fibers.
3. fiber composite core rod for intelligent overhead electric power transmission lead according to claim 1, is characterized in that, the compound basalt fibre layer of this epoxy resin is to form in the outside of this epoxy resin carbon fiber reinforce plastic layer with some basalt fibres.
4. fiber composite core rod for intelligent overhead electric power transmission lead according to claim 1, it is characterized in that, this epoxy resin carbon fiber reinforce plastic layer is to form in the outside of this carbon fiber knit layer with some the second carbon fibers, and the compound basalt fibre layer of this epoxy resin is in the formation of the outside of this epoxy resin carbon fiber reinforce plastic layer with some basalt fibres.
5. a preparation method who prepares fiber composite core rod for intelligent overhead electric power transmission lead claimed in claim 4, is characterized in that, this preparation method comprises the steps:
Step 1: the first carbon fiber is carried out surface treatment, then with the first carbon fiber, sensor fibre is woven, prepare carbon fiber knit sensor fibre unit;
Step 2: the second carbon fiber and basalt fibre are carried out surface treatment;
Step 3: the basalt fibre of the second carbon fiber of carbon fiber knit sensor fibre unit, aequum, aequum is introduced in epoxy resin impregnated zone flooded simultaneously, then pass through pultrude process, outside in carbon fiber knit sensor fibre unit forms epoxy resin carbon fiber reinforce plastic layer, the compound basalt fibre layer of epoxy resin successively, and epoxy resin is formed between the compound basalt fibre layer of this carbon fiber knit layer, epoxy resin carbon fiber reinforce plastic layer and epoxy resin, thereby obtains this described composite core rod.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105040492A (en) * | 2015-07-03 | 2015-11-11 | 天津鑫坤泰预应力专业技术有限公司 | Intelligent steel strand |
| WO2018232136A1 (en) | 2017-06-16 | 2018-12-20 | Saint-Gobain Adfors Canada, Ltd. | Sensing textile |
| CN108088593A (en) * | 2017-12-26 | 2018-05-29 | 浙锚科技股份有限公司 | Intelligent carbon fiber cable body |
| CN114459530A (en) * | 2021-04-27 | 2022-05-10 | 山东宽原新材料科技有限公司 | Intelligent composite core rod made of hybrid fibers |
| CN113899983A (en) * | 2021-06-30 | 2022-01-07 | 海南电网有限责任公司海口供电局 | Method and system for detecting quality of stranded carbon fiber and optical fiber composite overhead conductor |
| CN114242353A (en) * | 2021-12-27 | 2022-03-25 | 南方电网科学研究院有限责任公司 | Jumper insulator for ultra-light simple and easy ready-package uninterrupted power operation |
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| CN101418886A (en) * | 2008-12-10 | 2009-04-29 | 大连宇星净水设备有限公司 | Continuous fiber reinforced thermoplastic compound tube |
| CN101673599A (en) * | 2009-08-25 | 2010-03-17 | 浙江顺天复合材料有限公司 | Composite section material with grating fibers for cable and preparation method thereof |
| CN101944404A (en) * | 2009-02-24 | 2011-01-12 | 英特利赛沃有限责任公司 | Use the cable of impregnation of fibers intensity layer and/or the structure of optical cable |
| CN202217535U (en) * | 2011-09-09 | 2012-05-09 | 深圳市盟立电子有限公司 | Fiber composite core rod used for intelligent overhead power transmission lead |
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| US20080063875A1 (en) * | 2000-09-20 | 2008-03-13 | Robinson John W | High heat distortion resistant inorganic laminate |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418886A (en) * | 2008-12-10 | 2009-04-29 | 大连宇星净水设备有限公司 | Continuous fiber reinforced thermoplastic compound tube |
| CN101944404A (en) * | 2009-02-24 | 2011-01-12 | 英特利赛沃有限责任公司 | Use the cable of impregnation of fibers intensity layer and/or the structure of optical cable |
| CN101673599A (en) * | 2009-08-25 | 2010-03-17 | 浙江顺天复合材料有限公司 | Composite section material with grating fibers for cable and preparation method thereof |
| CN202217535U (en) * | 2011-09-09 | 2012-05-09 | 深圳市盟立电子有限公司 | Fiber composite core rod used for intelligent overhead power transmission lead |
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Effective date of registration: 20170117 Address after: 518000 Guangdong city of Shenzhen province Nanshan District Guangdong streets High-tech Park District Road No. 8 Keyuan Xunmei Technology Plaza 1 Building 9 layer 905 Patentee after: Shenzhen forever Technology Co., Ltd. Address before: 518000 Guangdong Province, Shenzhen Baoan District manhole Yabian Industrial Zone B, third students in District 5. Patentee before: Shenzhen Mengli Electronics Co., Ltd. |